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Care and maintenance
195
Electromagnetic immunity - Equipment with life support functions
Advisable separation distances between mobile and portable RF communications
equipment and the DualMax
The DualMax is intended for use in an electromagnetic environment in which radiated RF disturbances are
controlled, The customer or user of the defibrillator can help to prevent electromagnetic interference by maintaining
a minimum distance between the mobile and portable RF communications equipment (transmitters) and the
DualMax as recommended below, according to the maximum output power of the communication equipment.
Maximum output
power of the
transmitter (W)
Distance of separation according to the frequency of the transmitter (m)
150 KHz to 80 MHz
outside ISM bands
d=1.2.
150 KHz to 80 MHz
outside ISM bands
d=1.2.
80 MHz to 800 MHz
d=1.2.
800 MHz to 2.5 GHz
d=2.3.
0.01
0.12
0.12
0.12
0.23
0.1
0.38
0.38
0.38
0.73
1
1.2
1.2
1.2
2.3
10
3.8
3.8
3.8
7.3
100
12
12
12
23
For transmitters with a maximum output power not listed above, the advisable separation distance “d” in meters (m)
can be determined by using the equation applicable to the frequency of the transmitter, where “P” is the maximum
output power of the transmitter in watts (W) according to the transmitter manufacturer.
NOTE 1: at 80 MHz and 800 MHz, the separation distance for the highest frequency range is applied.
NOTE 2: the ISM (industrial, medical and scientific) frequency bands between 150 KHz to 80MHz are 6.765 MHz to
6.795 MHz; 13.553 MHz to 13.567 MHz; 26.957 MHz to 27.283 MHz; and 40.66 MHz to 40.70 MHz.
NOTE 3: an additional factor of 10/3 is used in calculating the advisable separation distance for transmitters in the
ISM frequency bands between 150 KHz and 80 MHz and in the frequency range 80 MHz to 2.5 GHz to reduce
the likelihood of interference that mobile/portable communications equipment could cause if taken inadvertently to
patient areas.
NOTE 4: these directives may not be applicable in all situation. Electromagnetic transmission is affected by the
absorption and reflection of structures, objects and people.